fix(lib): File Transports Not Emitting Errors On ENOENT Errors

Error handling for the `fs.stat` call in daily-rotate & file transports
was setup to only emit errors that weren't ENOENT errors. For ENOENT errors
it calls createAndFlush(0) and then does nothing to handle the error. Logic
was changed to always emit errors and call createAndFlush(0) if the error
is an ENOENT error.

fixes winstonjs#511

lib/winston/transports/daily-rotate-file.js

@@ -492,11 +492,11 @@ DailyRotateFile.prototype._createStream = function () {
 
     fs.stat(fullname, function (err, stats) {
       if (err) {
-        if (err.code !== 'ENOENT') {
-          return self.emit('error', err);
+        if (err.code === 'ENOENT') {
+          createAndFlush(0);
         }
 
-        return createAndFlush(0);
+        return self.emit('error', err);
       }
 
       if (!stats || (self.maxsize && stats.size >= self.maxsize)) {

lib/winston/transports/file.js

@@ -485,11 +485,11 @@ File.prototype._createStream = function () {
 
     fs.stat(fullname, function (err, stats) {
       if (err) {
-        if (err.code !== 'ENOENT') {
-          return self.emit('error', err);
+        if (err.code === 'ENOENT') {
+          createAndFlush(0);
         }
 
-        return createAndFlush(0);
+        return self.emit('error', err);
       }
 
       if (!stats || (self.maxsize && stats.size >= self.maxsize)) {